The bio-hacking community was disrupted last week by news of a novel biomarker - one measured by a wearable on the temple. It's aptly named 'Entropy', apt because of the chaos its revelation unleashed. The name, however, is not apt for what it's purported to measure: amount of energy consumed by the body. So, it shows a minimal value during periods of deep rest (sleep or deep meditation), and a maximal reading during periods of intense activity.
Individuals with some knowledge of thermodynamics will point out the difference between energy and entropy. Measuring energy expenditure is not the same as measuring entropy - a sophisticated concept that can be approximated as the degree of randomness or chaos within a system. Of course, 'Entropy' as a biomarker name is much more marketable than, say, 'Energy,' or any synonymous term such as 'Calorie'.
